How to define the mesh with GIMP element

Hello, @jgiven100 @bodhinandach
If I want to use the GIMP method, what should I do to set the mesh in the mesh.txt file.
In the benckmarks, there are only the ED2Q4 and ED3H8.
Could you please give an example. Thanks a lot
Best regards

Hi @fengzk I haven’t have much experience with GIMP. Maybe @cw646 can help?